JP2000211785A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a pasted side of a label paper sheet from adhering to a member to guide the pasted surface when a liner-less label roll is used for a roll paper. SOLUTION: A paper sheet carriage passage 9 which is a passage of a paper sheet S drawn from a roll paper R held by a roll paper holding part 4 comprises a first guide part 7 opposite to a printing surface side of the paper sheet S, and a second guide part 8 opposite to a back side of the printing surface side. A guide roller 16 rotatable around a shaft 17 approximately parallel to the width direction of the paper sheet S is arranged on the second guide part 8 over the whole area in a range to guide the paper sheet S. Even when the roll paper R is of liner-less label roll, a pasted surface on the back side of the printing surface of a label paper is guided by the guide roller 16, and since the guide roller 16 is rotated as the label paper is carried, the label paper is prevented from adhering to the paper sheet carriage passage 9 and being stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer that can use a linerless label roll in which a long label sheet is wound without a backing sheet.

[0002]

2. Description of the Related Art Conventionally, a printer that prints on roll paper wound with long paper is conventionally provided with a roll paper holding unit that holds the roll paper, and a paper conveyance in which the paper drawn from the roll paper holding unit is transported. And a printing unit that prints on a sheet conveyed along the sheet conveyance path.

In some conventional printers, the paper transport path is generally formed such that a pair of guide surfaces face each other at substantially equal intervals.

[0004]

In such a printer, conventionally, printing has been performed on a label paper having a glue surface on the back surface of the printing surface of the paper. The label paper conventionally used in such a printer is generally pasted on a long backing sheet in a state of being cut to a predetermined length in advance,
The mount is set in a printer as a label roll wound into a roll.

In recent years, there has been a demand for a printer that can use a linerless label roll in which a long label sheet that has not been cut is wound in a roll shape without the mount sheet, for the purpose of not wasting the mount sheet. ing.

However, in the conventional printer, when a linerless label roll is used, the paper is conveyed and printed in a state where the adhesive surface is exposed because there is no backing sheet, so that the adhesive surface of the label paper faces the adhesive surface. However, there is a disadvantage that it may be stuck on the guide surface which is used.

If the glue surface adheres to the guide surface, the label sheet is not conveyed, and the motor for applying the conveying force to the label sheet may step out. Further, it is difficult to peel off the label paper attached to the guide surface.

According to the present invention, when a linerless label roll in which a long uncut label paper is wound in a roll shape without a backing sheet is used as the roll paper to be mounted on the printer, It is an object of the present invention to prevent the label surface from being conveyed due to the glue surface being stuck to a member for guiding the glue surface.

[0009]

According to a first aspect of the present invention, there is provided a printer according to the first aspect of the present invention, wherein a roll paper holding section for holding a roll paper on which a long sheet of paper is wound, and the roll paper pulled out from the roll paper holding section. A paper transport path for transporting the paper formed by a first guide unit for guiding the print surface of the paper and a second guide unit for guiding the back surface of the print surface of the paper, and transport along the paper transport path A print head disposed on the print surface side of the paper, and a platen that presses against the print head across the paper transport path. A plurality of guide rollers are rotatable around an axis substantially parallel to the direction and support a plurality of locations spaced at predetermined intervals along the width direction of the paper, over a whole range of guiding the back surface of the printing surface of the paper. Characterized by being arranged .

Accordingly, when a linerless label is used, the glue surface of the label paper is supported at a plurality of locations spaced at predetermined intervals along the width direction of the glue surface by the guide rollers provided in the second guide portion. Guided by that. In other words, since the contact area between the guide roller and the adhesive surface is small, the adhesive surface is hard to stick to the guide roller and is easily peeled off. Therefore, the guide roller rotates as the label paper is conveyed. And a plurality of such guide rollers are arranged over the entire area of the second guide portion that guides the glue surface, so that the glue surface becomes the second guide portion that guides the glue surface. Since it does not stick, the label paper does not stay in the paper transport path.

According to a second aspect of the present invention, there is provided the printer according to the first aspect, wherein the guide roller is detachable from a grip portion for gripping the guide roller.

Therefore, even when the glue on the glue surface is transferred to the guide roller, the cleaning can be easily performed by removing the guide roller.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a printer according to the present invention will be described with reference to FIGS. First,
FIG. 1 is a perspective view illustrating an appearance of a printer 1 according to the present embodiment, and FIG. 2 is a cross-sectional plan view illustrating an internal structure of the printer 1.

The printer 1 according to the present embodiment is a portable printer which can be used by being carried on a waist or the like.
The front of the main body case 2 of the printer 1 is
The opening and closing cover 3, which is rotatably supported at one end, is opened and closed. The main body case 2 includes a roll paper holding unit 4 that holds roll paper and that stores roll paper.

The roll paper storage unit 4 has a semi-cylindrical concave surface 5 formed inside the main body case 2 and a semi-cylindrical concave surface 6 formed on the inner surface of the opening / closing cover 3. The roll paper R is stored in the space between the concave concave surfaces 5 and 6.

Sheet S pulled out from roll paper storage unit 4
The first guide portion for guiding the printing surface of the semi-cylindrical concave surface 6
Is formed by the guide surface 7 provided continuously to the second member. The second guide portion 8 facing the guide surface 7 forms a paper transport path 9 between the second guide portion 8 and the guide surface 7, and guides the back surface of the print surface of the paper S.

A thermal head 10 serving as a print head is attached to the opening / closing cover 3, and a platen 11 is rotatably provided at a position facing the thermal head 10 in the main body case 2 across the paper transport path 9. Have been. The thermal head 10 is urged by an urging member such as a spring (not shown) in a direction in which the thermal head 10 comes into pressure contact with the platen.

On the downstream side of the opening / closing cover 3 in the paper transport direction,
A discharge port 12 from which the printed paper S is discharged is formed.

A release plate 13 is provided on the same side as the platen 11 with respect to the paper transport path 9 near the downstream side of the platen 11 in the paper transport direction. A peeling roller 14 that comes into pressure contact with the platen 11 from the same side as the platen 11 is attached.

The second guide portion 8 includes a guide surface 15 provided continuously with the semi-cylindrical concave surface 5 and a plurality of guide portions 8 extending along the paper transport direction over the entire area for guiding the back surface of the print surface of the paper S. The guide roller 16 and the guide roller 16 are provided. The guide roller 16 has a shaft 17 substantially parallel to the width direction of the sheet S,
A plurality of ring members 18 are rotatably mounted. Further, the guide roller 16 is used for the ring member 1.
8 is attached at a position where it protrudes partially from the guide surface 15.

FIG. 3 is a schematic diagram showing the positional relationship between the sheet S and the guide rollers 16. The ring member 18 is formed in the shape of a Soloban bead so that the paper S and the outer periphery of the ring member 18 come into contact with a very small area.

In such a configuration, the printer 1
Printing is performed by the thermal head 10 while the sheet S is transported by rotating the platen 11. In printing, the paper S may be back-fed in order to align the paper S. In that case, as shown by a virtual line in FIG.
The paper S becomes loose.

Here, when the roll paper R is a label roll formed by winding an elongate backing sheet on which a label sheet is pasted, the backing sheet is replaced with the thermal head 10 as shown by a dotted line in FIG. It is hung around the peeling plate 13 from the passed position,
It passes through the space between the peeling roller 14 and the platen 11 and exits to the tip of the openable cover 3. The backing sheet is conveyed by the rotation of the platen 11 and discharged by being wound around in this manner.

In this case, when the roll paper R is a linerless label roll in which a long label paper is wound without a backing sheet, the adhesive surface of the label paper is guided by the guide rollers 16, so When the paper is fed back and slackened, the glue surface of the label paper is pressed by the outer periphery of the ring member 18 and does not stick to the guide surface 15. Since the contact area between the outer periphery of the ring member 18 and the glue surface is small, the glue surface is difficult to stick to the ring member 18 and easily peels off.
The ring member 18 rotates as the label paper is transported, and does not hinder the transport of the label paper. Therefore, the label paper is prevented from sticking to the paper transport path 9 and stagnating.

It should be noted that the guide rollers 16
May be made detachable from the main body case 2. In this case, even if the adhesive of the linerless label adheres to the guide roller 16 while the printer 1 is used, the guide roller 16 can be easily cleaned by removing the guide roller 16 from the main body case 2.

Next, a second embodiment of the printer according to the present invention will be described with reference to FIGS. First,
FIG. 4 is a vertical right side view showing the structure of the printer 21 of the present embodiment.

The printer 21 is provided with a roll paper holder 23 as a roll paper holding section behind the housing 22, and an upper unit 24 and a lower unit 25 are provided in the housing 22. The upper unit 24 includes a lower unit 25,
One end is rotatably supported, and the upper unit 24 and the lower unit 25 can be separated from each other by rotating the upper unit 24 with respect to the lower unit 25.

A first guide portion for guiding the printing surface of the paper S pulled out from the roll paper R is formed by a guide surface 26 provided below the upper unit 24.
The second guide portion 27 facing the guide surface 26 is provided in the lower unit 25, forms a paper transport path 28 with the guide surface 26, and guides the back side of the print surface of the paper S.
The paper transport path 28 includes the upper unit 24 and the lower unit 2.
It can be opened by moving it away from 5.

The upper unit 24 includes a head block 30 to which a thermal head 29 as a print head is attached.
It has. Further, the head block 30 includes a pair of ribbon cores 31 and 32. Ink ribbon I
The thermal head 2 set on one ribbon core 31
9 and then wound around the other ribbon core 32.

The lower unit 25 includes a thermal head 29
A platen 33 that is in pressure contact with the platen via a sheet conveyance path 28, a release plate 34 that is located downstream of the platen 33 in the sheet conveyance direction, and a take-up core 35 that is located below the platen 33.

The housing 22 includes a thermal head 29.
A paper discharge port 36 is formed to discharge the paper S printed on the paper S.

Here, the second guide portion 27 includes a plurality of guide surfaces 37 provided on the upper portion of the lower unit 25 and a plurality of guide portions 37 extending along the paper transport direction over the entire area for guiding the back surface of the print surface of the paper S. The guide roller 38 is provided with the guide roller 38. The guide roller 38 is formed such that a shaft 39 substantially parallel to the width direction of the paper S is rotatably penetrated through a plurality of disk-shaped ring members 40. In addition, the guide roller 38
The outer periphery of the ring member 40 is attached at a position where it protrudes partially from the guide surface 37.

FIG. 5A is a plan view of a part of the sheet conveying path 28 showing a structure for attaching the guide rollers 38 to the guide surface 37, and FIG. 5B is a front view thereof. Guide roller 3
8 is dropped into a concave portion 41 formed on the guide surface 37, and both ends of a shaft 39 are fitted into a shaft holding groove 42 which is a grip portion on both sides of the concave portion 41. The shaft holding groove 42 has an inlet portion 42 a formed to be narrower than the diameter of the shaft 39,
9 is formed slightly larger than the diameter. In addition, the inlet portion 42a is formed to have a small thickness along the depth direction of the shaft holding groove 42, and is elastically bent to a force applied along the depth direction of the shaft holding groove 42. . Thus, the shaft 39 is elastically detachable from the shaft holding groove 42.

In such a configuration, the printer 21
When the platen 33 is driven to rotate, the paper S is pulled out from the roll paper R, and the thermal head 29 prints on the print surface of the paper S. The printed paper S is discharged from the paper discharge port 36.

In printing, after the paper is cut by a cutter (not shown), the paper S is back-fed in order to position the paper S for printing on a portion between the cutter and the thermal head 29. There is
At that time, the sheet S is loosened.

Here, when the roll paper R is a label roll formed by winding a long backing paper on which the label paper is stuck, the backing paper is hung on the peeling plate 34 from a position past the thermal head 29. It is turned and wound by the winding core 35.

When the roll paper R is a linerless label roll in which a long label paper is wound without a backing sheet, the adhesive surface of the label paper is guided by the guide rollers 38. When the paper is fed back and slackened, the glue surface of the label paper is pressed by the outer periphery of the ring member 40 as in the previous embodiment, so that it does not stick to the guide surface 37. And the ring member 40
The contact area between the outer periphery of the ring and the glue surface is small.
Since the glue surface is hard to stick to 0 and easily peels off, when the label paper is transported again, the ring member 40 rotates as the label paper is transported, and does not hinder the transport of the label paper. Therefore, the label paper is prevented from sticking to the paper transport path 28 and stagnating.

In this embodiment, the guide roller 38 can be removed from the shaft holding groove 42 which is a gripping portion.
Even when the outer periphery of the ring member 40 becomes sticky due to the transfer of the glue from the glue surface, it can be easily cleaned.

In the first and second embodiments, the shaft constituting the guide roller and the ring member are separated from each other, and the ring member is freely rotatable with respect to the shaft. The ring member and the shaft may be formed integrally, and the shaft may be rotatable with respect to a supporting portion that supports the shaft.

In the first and second embodiments, the outer periphery of the ring member is circular. However, in practice, it is sufficient that the contact area with the glue surface is small.

Further, in the first and second embodiments,
A guide surface is provided on the second guide portion, and a part of the outer periphery of the guide roller protrudes from the guide surface. However, in practice, the second guide portion has no guide surface, and only the arranged guide rollers are provided. May be formed.

In the first and second embodiments, the guide rollers are provided only in the second guide portion. However, in the embodiment, the guide rollers may be provided in the first guide portion.

[0043]

According to the first aspect of the present invention, of the pair of guide portions which form the paper transport path and face the printing surface of the paper and the back surface thereof, the guide portion facing the back surface of the printing surface includes:
Since the guide rollers that are rotatable around an axis substantially parallel to the width direction of the paper and that support a plurality of locations spaced at predetermined intervals along the width direction of the paper are arranged over the entire area of the range for guiding the paper, Even when the roll paper is a linerless label roll, the glue surface of the label paper is guided by the guide roller contacting and supporting it with a small area, so the glue surface is difficult to stick to the guide roller and is easily peeled off, and Since the guide rollers rotate as the label paper is transported, it is possible to prevent the label paper from sticking to the member forming the paper transport path and stagnating.

According to the second aspect of the present invention, the guide roller is
Since the guide roller is detachable from the gripper, it can be easily cleaned by removing the guide roller from the gripper even if the adhesive on the glue surface is transferred to the guide roller and becomes sticky. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an appearance of a printer according to a first embodiment of the invention.

FIG. 2 is a cross-sectional plan view showing the internal structure of the printer.

FIG. 3 is a schematic diagram illustrating a positional relationship between a sheet and a guide roller.

FIG. 4 is a vertical right side view showing a structure of a printer according to a second embodiment of the present invention.

FIG. 5A is a plan view of a part of a sheet conveyance path showing a structure for attaching guide rollers to a guide unit, and FIG. 5B is a front view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printer 4 Roll paper holding part 7 First guide part 8 Second guide part 9 Paper conveyance path 10 Print head 11 Platen 16 Guide roller 17 Axis 21 Printer 23 Roll paper holding part 26 First guide part 27 Second Guide section 28 Paper transport path 29 Print head 33 Platen 38 Guide roller 39 Axis 42 Gripping section

Claims (2)

[Claims] A roll paper holding unit configured to hold a roll paper on which a long paper is wound; a first guide unit configured to guide a printing surface of the paper pulled out from the roll paper holding unit; A paper transport path for transporting the paper formed by a second guide portion for guiding the back side of the print surface of the paper, and printing disposed on the print surface side of the paper transported on the paper transport path A printer comprising a head and a platen that presses against the print head across the paper transport path, wherein the second guide portion is rotatable about an axis substantially parallel to a width direction of the paper, A printer characterized in that a plurality of guide rollers for supporting a plurality of locations spaced at predetermined intervals along the width direction of the paper are provided over the entire area for guiding the back side of the printing surface of the paper. 2. The printer according to claim 1, wherein the guide roller is detachable from a grip portion that grips the guide roller.